Essentiel Antwerp puts a playful twist on classic tailoring with this crisp cotton buttondown featuring dramatic cascading ruffles and an exaggerated silhouette. Essentiel Antwerp puts a playful twist on classic tailoring with this crisp cotton buttondown featuring dramatic cascading ruffles and an exaggerated silhouette. Essentiel Antwerp is an ode to play. Going off-piste since 1999, the powerhouse was founded by duo Esfan Eghtessadi and Inge Onsea as a bold antidote to the minimalist, monochromatic fashion scene. Brand signatures like print, color, and proportion are found across an extensive ready-to-wear and accessories collection.